I enhanced over 1000 pictures with "Auto Enhancement!"... afterwards I tried to use DxO Optics Pro - and found that the camera model was missing in the Exif data.

The camera model (Exif: Source Device) was replaced by iView to "QuickTime 7.1.3" (Source Software) - now DxO is not capable to correct the pictures anymore, because of the missing Exif information for the camera model.

Is there any possibility to "go back to earlier version" in batch mode or with an AppleScript? I don't want to do this for more than 1000 pictures manually...

Hi Wolfgang,
Check with DXO if there is any way you can tell their software what camera model the photo was taken with. Failing that there are a number of Exif changer utilities available (a quick search returned a few just now) that should allow you to drag and drop process these files back to their original data.
Regards,
Tim.